Abstract: Provided is a method of manufacturing a zinc-plated steel sheet. The method includes: coating a metal on the steel sheet on a steel sheet; annealing the metal coated steel sheet; and zinc plating the annealed steel sheet by dipping in a molten zinc plating bath. Further provided is a method of manufacturing a hot-press part including: coating a metal on the steel sheet on a steel sheet; annealing the metal coated steel sheet; zinc plating the annealed steel sheet by dipping in a molten zinc plating bath; heating the zinc-plated steel sheet; and press forming the heated steel sheet.

Abstract: A method of a base station (BS) of a carrier aggregation (CA) is provided. The method includes determining whether a mobile station (MS) concurrently uses a first cell associated with a first carrier frequency and a second cell associated with a second carrier frequency, and controlling a handover of the MS using a measurement configuration set corresponding to a result of the determination among a plurality of measurement configuration sets that are set for each of handover related events.

Abstract: A method of a base station (BS) of a carrier aggregation (CA) is provided. The method includes determining whether a mobile station (MS) concurrently uses a first cell associated with a first carrier frequency and a second cell associated with a second carrier frequency, and controlling a handover of the MS using a measurement configuration set corresponding to a result of the determination among a plurality of measurement configuration sets that are set for each of handover related events.

Abstract: Provided is an apparatus and method for ranging in a broadband wireless communication system. In a method for communication of a base station, a received signal and ranging codes are correlated to detect codes. Feedback information for the detected codes is generated, and a ranging feedback message including the generated feedback information is generated. The ranging feedback message is physical-layer-encoded and the resulting data are broadcast. The base station combines and broadcasts data region allocation information and control information for ranging codes received from a plurality of mobile stations. Therefore, resources can be saved and a signalling process can be simplified.

Abstract: Disclosed is a method for performing a handover in a communication system, comprising causing the MS to receive a ranging code including the information on a handover bandwidth request ranging code from a serving BS, the handover bandwidth request ranging code being used for the MS to get an uplink bandwidth required for the handover allocated by the serving BS in a contention-free scheme, and causing the MS to request the serving BS to allocate the uplink bandwidth for the handover by using the handover bandwidth request ranging code.

Abstract: A handover apparatus and method for a multi-hop system in a BWA communication network are provided. In a handover system supporting multi-hop system in a BWA communication network, a BS periodically broadcasts a message with neighboring BS/RS information. When a new BS or RS needs to be added, an RS periodically broadcasts the broadcast message received from the BS with information about the new BS or RS. An MS receives the broadcast message from the RS and requests information about BSs or RSs to which the MS can perform a handover by notifying candidate BSs or RSs for the handover. The candidate BSs or RSs may include a BS or RS not included in the broadcast message, if the MS detects the BS or RS by scanning. The MS selects a target BS or RS based on the BS or RS information received from the BS, and performs the handover to the target BS or RS.